Telescopic Ladders?

im fairly new to window cleaning and am more wfp but i have secured a large contract and am going to use a lot of water if i do all windows wfp so am thinking of wfp tops and trad the ones i can reach from the ground but some are just to high for a small step. i have bought a extension pole for my mop and squeegee but thought a little telescopic ladder would be good for space in my van. so really after recommendations on what makes of telescopic ladders are good and if they help with trad.

cheers!

Oops!......sorry, I just posted about telescopic ladders as well..didnt see your post, scotty boy